package com.sky.controller.user;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONArray;
import com.sky.constant.StatusConstant;
import com.sky.entity.Dish;
import com.sky.result.Result;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import java.util.List;

@RestController("userDishController")
@RequestMapping("/user/dish")
@Slf4j
@Api(tags = "C端-菜品浏览接口")
public class DishController {
    @Autowired
    private DishService dishService;

    @Autowired
    private StringRedisTemplate redisTemplate;

    /**
     * 根据分类id查询菜品
     *
     * @param categoryId
     * @return
     */
    @GetMapping("/list")
    @ApiOperation("根据分类id查询菜品")
    public Result<List<DishVO>> list(Long categoryId) {

       //创建redis的key
        String key="dish_"+categoryId;

        //获取redis中的菜品
        String s = redisTemplate.opsForValue().get(key);
        List<DishVO> dishVOList = JSONArray.parseArray(s,DishVO.class);

        //判断该菜品是否存在，若存在，则直接返回
        if (dishVOList != null && dishVOList.size() > 0) {
            return Result.success(dishVOList);
        }

        //不存在先走mysql
        Dish dish = new Dish();
        dish.setCategoryId(categoryId);
        dish.setStatus(StatusConstant.ENABLE);//查询起售中的菜品

         dishVOList = dishService.listWithFlavor(dish);

        //再缓存到redis
        redisTemplate.opsForValue().set(key, JSON.toJSONString(dishVOList));



        return Result.success(dishVOList);
    }

}
